What is the translation of " DIFFICULT TO DATE " in French?

• difficile à dater
• difficiles à dater

Examples of using Difficult to date in English and their translations into French

Difficult to Date.
Difficile à dater.

They are difficult to date.
Elles sont difficiles à dater.

Many are before Old Wedgwood is difficult to date.
Le vieux wedgwood est difficile à dater.

That's difficult to date.
C'est difficile à dater précisément.

These types of monument are notoriously difficult to date.
Ces monuments sont très difficiles à dater.

It is difficult to date Proverbs.
Il est difficile de dater les Proverbes.

This type of name is difficult to date.
Cet ensemble est difficile à dater.

It is difficult to date this megalith.
Il est difficile de dater ce mégalithe.

The painting is difficult to date.
Le tableau est difficile à dater.

It is difficult to date these huge stones;
Il est difficile de dater ces grandes pierres;

These seals are difficult to date.
Ces tombes sont difficiles à dater.

It's difficult to date this postcard precisely.
II nous est difficile de dater cette carte postale avec précision.

The painting is difficult to date.
Le décor peint est difficile à dater.

It is difficult to date many of these writings very precisely.
Beaucoup de ces écrits sont difficiles à dater précisément.

Old Wedgwood is difficult to date.
Le vieux wedgwood est difficile à dater.

It's difficult to date the origin of Kurdish literature.
Il est difficile de dater l'origine de la littérature kurde.

So the unit is difficult to date.
De ce fait, l'ensemble est difficile à dater.

The building has undergone repeated alteration and is therefore difficult to date.
Ils ont subi bien des remaniements et sont donc difficiles à dater.

Therefore it is difficult to date accurately.
Il est donc difficile de dater avec exactitude.

These revelations make the painting difficult to date.
Ces informations rendent la peinture difficile à dater.